A nurse working at a clinic speaks on the telephone with a parent of a 2-month-old infant. The parent tells the nurse that the infant has projectile vomiting followed by hunger after meals. Which of the following responses by the nurse is appropriate?

A. "Bring your infant into the clinic today to be seen." This is the appropriate response. Projectile vomiting can be a sign of pyloric stenosis, a condition that requires prompt medical evaluation and potential surgical intervention. B. "You might want to try switching to a different formula." While switching formula might be considered for minor feeding issues, projectile vomiting is severe and warrants immediate medical attention rather than a dietary change. C. "Give your infant an oral rehydration solution." Oral rehydration might be useful for dehydration, but it does not address the underlying cause of projectile vomiting, which needs to be diagnosed and treated by a healthcare professional. D. "Burp your child more frequently during feedings." Although burping can help with mild spit-ups, projectile vomiting is a more serious symptom that requires medical evaluation rather than just a change in feeding practices.